Light from a monochromatic source shines through a double slit onto a screen 5.0 m away. The slits are 0.18 mm apart. The dark bands on the screen are measured to be 1.7 cm apart. What is the wavelength of the incident light?
A)
457 nm
B)
306 nm
C)
392 nm
D)
612 nm
E)
784 nm
D
You might also like to view...
The purpose of the moderator in a reactor is to
A. separate the nuclear fuel from the spent products of fission. B. provide cooling for the control rods. C. reduce the number of neutrons available for the chain reaction. D. slow neutrons down so that they will be more likely to initiate fission reactions.
If we are optimistic in our assumptions about the development of life and intelligence, then the number of technological civilizations in the galaxy should equal the:
A) average lifetime of a civilization. B) number of stars forming per year. C) average number of planets per star. D) number of stars in the galaxy's habitable zone. E) average number of planets that produce life.
The atmospheric gases primarily responsible for our greenhouse effect are
A) carbon monoxide and methane. B) hydrogen and helium. C) oxygen and carbon dioxide. D) water vapor and carbon dioxide. E) argon and water vapor.
An object that is 4.0 cm tall is placed 15 cm in front of a concave mirror of focal length 20 cm
(a) Where is the image formed and how far is it from the mirror? (b) How tall is the image? What will be an ideal response?